Dyer and St. John to Monon

The CSX line, run by Direct Traffic Control (DTC), speed limit 50 mph, continues south-southeast from Dyer (MP 27.6), past the 2,665 ft. Dyer Siding (MP 29.0), on the east side of the line, where the speed limit is 40 mph and then rises to 79-60-50 mph, and a grade crossing with an east-west street, to a flat crossing with a north-south former New York Central line at St. John, after which it turns south again. The route is entirely single track, and the first segment is the Dyer Block for DTC purposes, turning just east of due south and changing to the Lowell Block at the signals at MP 30.4, with a road alongside to the east, passing two grade crossings with east-west streets, a grade crossing with a north-south street, new housing on both sides of the line, a lumber yard on the east side, Intermediate Signals (MP 32.x), a highway bridge overhead, a grade crossing, Cedar Lake (speed limit 60-50 through town), with town on both sides of the line, a grade crossing, Intermediate Signals, town on the west side, a grade crossing, many new houses (in 2006) on the east side, a lake on the east side, two grade crossings, a detector "Cedar Lake", a grade crossing, two dirt road grade crossings, Intermediate Signals (MP 37.x), a dirt road grade crossing, a pond or lake on the west side, a bridge over a road, a grade crossing, Intermediate Signals (MP 39.x), Creston (speed limit 70-40 through town), with town on both sides, a grade crossing, a wooded cutting, a grade crossing, a grade crossing at an acute angle, a grade crossing, Intermediate Signals (MP 42.x), a grade crossing, the town of Lowell on both sides, a grade crossing, an old depot on the east side, and the 3,215 ft. siding at Lowell (MP 44.8), where the speed limit is 50-30, rising to 70-50 for the next two miles.

The Surrey Block begins at MP 45.5 (south end of the siding), followed by a bridge over a ditch, a bridge over a river, and a grade crossing. The speed limit rises to 79-60-50 at the Intermediate Signals at MP 47.1, as the line turns east-southeast again, past a dirt road grade crossing, a bridge over a ditch, a dirt road grade crossing, a bridge over a ditch, Intermediate Signals (MP 50.x), a bridge over a ditch, a grade crossing, a flat crossing with an east-west ex-NYC line at Shelby with signals both north and south of it, the town on the east side, a grade crossing, a bridge over a river, a detector at "Thayer", a grade crossing in Thayer, a grade crossing at an angle, two grade crossings, a grade crossing in the town of Rose Lawn and extra track on the northeast side at the 4,095 ft. siding on the northeast side at Rose Lawn (MP 56.5),

The line continues past a dirt road grade crossing, Fair Oaks, where a C&EI line once crossed at grade, Intermediate Signals (MP 60.x), a dirt road grade crossing, the I-65 bridges overhead, a grade crossing, Intermediate Signals (MP 62.x), Parr, two grade crossings, a radio transmission antenna to the east, a grade crossing, a dirt road grade crossing, a grade crossing, and extra track/spur on the north side with a grade crossing at an acute angle at the 5,415 ft. siding on the north side at Surrey (MP 68.1), which has a dirt road grade crossing within it. The Surrey Block ends and the Monon Block starts at MP 68.2, with open fields on both sides, passing a grade crossing, a dirt road grade crossing, Intermediate Signals (MP 70.x), three dirt road grade crossings, a grade crossing at an acute angle, a dirt road grade crossing, a grade crossing in the town of Rensselaer, where the line turns due east, the speed limit is 70-50 on the curve, there is a grade crossing, the north end of the siding, and extra track on the north side serving silos across from the Amshack on the south side (MP 71.0), and the 4,095 ft. siding on the north side at Rensselaer Siding (MP 71.1), which has town on both sides and a grade crossing within it.

There is a dirt road grade crossing, a detector at "Rensellaer", a  turn southeast with a speed limit of 50 mph from MP 72.3 to MP 72.7, before Pleasant Ridge, a dirt road grade crossing, an acute angle grade crossing, extra tracks on the east side serving silos, a dirt road grade crossing, a grade crossing, Intermediate Signals (MP 81.x), McCoysburg, where a Monon branch once trailed in from the north,  a dirt road grade crossing, a grade crossing, Intermediate Signals (MP 83.x), Lee, a grade crossing, and Intermediate Signals (MP 86.1). The Junction Block runs from MP 86.1 to 90.3, with an acute angle grade crossing, then extra track on the north side, expanding to two and then three extra tracks before reaching Monon, where the town is on both sides of the line, and there is extra track on the south side as well. At Monon (MP 88.4), the route’s direction changes from southeast to due south, on a big curve with a 15 mph speed limit, where the crossing of the Monon line’s two major routes used to be. The legs north to Michigan City, and SSE directly to Indianapolis are now largely defunct. There is a grade crossing just east of the west end of the curve, the depot is on the northeast side of the curve in between the stubs of the closed lines and their crossing. (The depot was in the angles of the Chicago and Indianapolis, and Chicago and Michigan City Lines, southwest of the crossing of the Indianapolis and Michigan City lines, when all those lines existed.)